Overseaming sewing-machine.



G. M. EAMES & J. s. FINGH.

OVERSEAMING SEWING MACHINE.

APPLICATION FILED JAN. 2, 1913.

Patented Mar. 23, 1915.

3 SHEETS-SHEET 1.

G. M. EAMES &: J. S. FINGH.

OVBRSEAMING SEWING MACHINE. APPLICATION TILED JAN. 2, 1913.

1,133,012. Patented Mar.23, 1915.

3 SHEETS-SHEET 2.

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,4 TTORIVEY G. M. EAMBS & J. S. FINGH. OVEESEAMING SEWING MACHINE.

APPLICATION FILED JAN. 2, 1913.

l 1 33,01 2. Patented Mar. 23, 1915.

3 SHEETS-SHEET 3.

WITNESSES: INVENTORS ocgej/fgmcq a. wzyairzigzncfl 10 'W Mww. M ATTORNEY THE NORRIS PETERS (10.. PHOTO'LITHQ. WASHINGTON. D. C

GEORGE M. EAMES AND JOHN S. FINCI-I, OF BRIDGEPOR'I,.CONNECTIGUT, ASSIGNORS To THE SINGER MANUFACTURING COMPANY, A CORPORATION OF NEW JERSEY.

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. Specification of Letters Patent. Patented Dial, 23, 1915 Application fi1ed anuary 2, 1913. Serial No. 739,724.

To all whom it may concern Be it known that we, GEORGE M; EAMEs and JOHN S. FINCH, citizens of the United States, residing at Bridgeport, in the county of Fair-field and, State of Connecticut, have invented certain new and useful Improvements in Overseaming Sewing-Machines, of l wh1ch the following is a specification, reference being had therein to the accompanying drawings. I

ThlS invention relates to lmprovements 1n overseaming sewing machines, and particu- 1 larly to that class of machines employing two loop-takers in connection with a single needle capable of lateral movements of a comparatively wide range, and has for its object to provide improved means for controlling the movements of the needle in different planes.

Referring to the drawings, Figure 1 is a view in front side elevation of an overseaming sewing machine equipped with the present invention, Fig. 2 a top plan view of Fig. 1, Fig. 3 an underside'view of the bed-plate shown in the previous figures, Fig. 4: a view in front end elevation of Figs. 1 and 2, Fig. 5 a plan view of the loop-takers, throat or needle plate, feed-dog, and a portion of the bed-plate, Fig. 6 a view representing details later to be referred to, Fig. 7 a perspective view of the arm bracket face-plate, and Fig. 8 a view of the reverse sides of a fabric stitched on the present machine.

' 1 represents the bed-plate of the sewing machine, upon-which is mounted the bracket arm comprising the arm standard 2 and arm bracket 3, 4 the main or needle-bar-driving shaft carrying at its rear end the hand or band wheel 5 and at its opposite end the usual take-up cam 6 for actuating the takeup lever 7 the front face of said cam being provided with a stud bearing 8 upon which is pivoted one end of a needle-bar-actuating link 9.

10 represents the needle-bar gate mounted .to oscillate onpintle screws, as 11, threaded into the head 12 of the arm bracket 3, and at its front edge provided with bearing hubs 13 and 14 and extension 15, the latter operatively connected through the needle-bar gate connection 16 with the adjustable slide 17 carried by the oscillating lever 18 provided with a downwardly extended bearing shaft 19, which latter is mounted to oscillate in a suitable bearing formed in the bracket 20 are transmitted from said main shaft to said secured by screws, as 21, to the rear side of which is pivotally mounted 'thestem 24 (shown in dotted lines only, Fig. 2.) of the cam follower 25, which latter tracks cam grooves, as 26, of the switch cam 27 carried by the main shaft 4, whereby lateral move- .ments are transmitted from the main shaft to the gate 10.

In the bearing hub 13 is journaled a needle-bar bearing 28 provided at its upper end with a pinion 29, its opposite endbeing threaded to accommodate adjusting nuts, as 30, whichlatter, in connection with said pinion, act to hold the bearing against endwise movement in the hub 13, saidbearing being provided with. a keyway 31 which coacts with a key 32 carried'by the needle-bar 33 to hold the latter against axial movement independently of the movements of the bearing 28. I t 3 1 represents a-tubular bearing member which is mounted to move vertically ina suitable bearing formed in thehub 14, and

cured on said needle-bar acting to transmit to the latter vertical movements corresponding to thevertical movements of the tubular bearing, which latter is provided with a stud 37 upon which is fulcrumed-the lower end of the link 9, thus vertical movements needle-bar. 1

38 represents a spring-depressed clothpresser-carrying bar provided at its lower end with a cloth-presser 39 and carrying a press'er-lifting lug 4O for coacting with a manually operated presser-lifti'ng lever 4:11, as in earlier constructions. v

41 represents a. rotating crank shaft mounted in suitable bearings depending from the bed-plate and operatively connected with'the main shaft through suitable o|uarterin, cranks, as 12, and crank connections, as 43, saidcrank shaft being provided with a; gear 41 which meshes with a gear 45 carried-by the loop-taker-actuating shaft 46, and as the ratio of said gears is as two to one the shaft {16 is given two rotations to one rotation of, the shaft 11, these parts 7 being substantially'the same as in all machines of the class referred to herein a7 represents the left hand and l8 the right hand loop-taker, each provided with a suitable thread-holding case, as 49, and a loop-taker shaft, as (one only of which is shown), and to the lower end of each is suitably secured a bevel gear, as 51, which meshes with a like gear 52 carried the loop-taker-actuating shaft 46, the shafts 50 being journaled in suitable bearings formed in the left and right hand saddles 53 and 54, respectively, adjustably secured to the underside of the bed-plate by suitable "screws, as 55.

The means employed for giving to the feed-dog 56 its feed movements and controlling the amplitude of said movements may be of any suitable construction, one form of which is shown in the drawings, but it is not deemed necessary to specifically describe'such mechanism, since it is well understood. v

57 represents the arm bracket face-plate of usual construction provided with the commonly e'm'ployed thread-check 58, threadtension and thread-controllerfil) and secured" to the arm bracket head 12by' suitable "screws, as 61, threaded into openings, as 62, formed in said head;

'63 represents a segment gear pivoted on a bearing stud 6 1 threaded into the head 120i the arm bracket, and having pivoted to it, by'studscrew6'5, one end of a link "'66 whose opposite end is pivotally mounted on a stud 67 carried by the adjustable slide block 68 which tracks the'under-cut groove '69formed in the'oscillating lever 18, a wing nut 'ZO acting "to hold said slide block in the desired adjustment with respect to the axis of thebearing shaft 19, and said segment gear meshing with thepinion 29.

When employing a single needle in connection with two loop-takers for effecting stitches first at o'neand then at the opposite side of the median line of vertical movement of the needle, the needle must befgiven a half turn so that in the formation of each stitch'the-lo'o'p of needlethread will be properly presented to the loop-taker. In the present construction, assuming that the needle openings, as 71, in the throat or needl plate '72 represent the limit oflateral movement of the needle, that the present "adjustment of the slide block 17 in the groove 69 o fthelever 18 representsthe adjustme'nt of the connection '16 toeft'ect lat- 'eral movements of the needle corresponding to the distance between said needle openings,'and that the axis of the stud 67 connecting the link 66 with the segment gear 63 coincides with the axis of thebearing stud 19, the operation of the machine would cause the needle to be alined first with one andthen with the other of saidneedle openings, and the now stationary segment gear would act on the pinion 29 to give the needle a half turn, thus effecting a like cooperation of needle and loop-takers, whether at one or the opposite'side of the median line of vertical movement of the needle. W hen it is desired to lessen the amplitude of the lateral movements of the needle, the attendant adjusts the slide block 17 in the direction of the axis of the bearing stud 19, which of itself would negative the means for giving to the needle its half turn, and to overcome this the slide block is adjusted from the axis of the bearing stud 19 a dis tance suthcient to give to the segment gear such movement as is necessary to compensate for the shortening of the lateral movements of the needle, which form of needle control makes practical the employment of a needle secured concentric with the axis of the needle-bar, and provides adjusting means for changing the amplitude of the lateral movements of said needle.

What we claim is 1. In an overseaming sewing machine, the combination with a stitclrforming mechanism including multiple loop-takers, a needle- 1 bar reciprocated in different paths, and a needle carried by said needle-bar and 'cooperating with each of the loop-takers to form stitches, of means for giving to said needle oscillatory movements-about the longitudinal axis of the'needle bar intermediate the different paths of reciprocation of the needle.

2. In an overseaming' sewing machine, the combinatlon with a stltch-formlng mechanism including multiple loop-takers and a reciprocating needle-bar provided with a needle cotiperating with each of the looptakers to form stitches, of meansincludin'g coacting gear members for giving to said needle-bar lateral and oscillatory movements intermediate the different reciprocations of the needle.

3. In an overseaming sewing'machine, the combination with a stitch-forming mechanism including multiple loop-takers and a reciprocating and laterally movable needlebargprovided'with a needle codperating with each of the loop-takers to form'stitches, of means for giving to said needle-bar oscillatory movements including coacting gear members, one of said gear members being controlled to meet changes inthe amplitude of said lateral movements.

4. In an over'seaming sewing machine, the combination with a stitch-forming mechanism including multiple loop-takers and a needle-bar provided with a concentrically mounted needle cooperating with each of the loop-takers to form stitches, of means for giving to said needle vertical, lateral and oscillatory movements including c'oacting gear members.

5. In an overseaming sewing machine, the combination with a stitch-forming mechanism including multiple loop-takers, and a needle-bar provided with a concentrically mounted needle cooperating with each of the loop-takers to form stitches, of means for giving to said needle vertical, lateral and oscillatory movements including a main shaft for giving to said needle its vertical movements, a cam carried by said main shaft for effecting said lateral movements, and coacting gear members for effecting said oscillatory movements.

6. In an overseaming sewing machine, the combination with a stitch-forming mechanism including multiple loop-takers, and a needle-bar provided with a concentrically mounted needle cooperating with each of the loop-takers to form stitches, of means for giving to said needle vertical, lateral and oscillatory movements including coacting gear members, and means for maintaining said needle-bar in effective relationship with said gear members.

7. In an overseaming sewing machine, the combination with a stitch-forming mechanism including multiple loop-takers, a reciprocating needle-bar, and a concentrically mounted needle carried by said bar, said needle coacting with said loop-takers to form stitches, of means for giving to said needle lateral and oscillatory movements intermediate the difierent paths of reciprocation of the needle.

In testimony whereof, we have signed. our names to this specification, in the presence of two subscribing witnesses.

- GEORGE M. EAMES.

JOHN S. FINCH.

Witnesses F. W. CUTTING, A. M. DONIHEE.

Copies of this patent may be obtained for five cents each, by addressing the 3 of Patents Washington, D. 0." 

